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Logic Gates Practice Questions

This document contains several logic circuit diagrams and truth tables along with questions about identifying logic gates from truth tables and drawing logic circuits from logic statements. Specifically, it asks the reader to: 1) Identify single logic gates from completed truth tables 2) Draw logic circuits and complete truth tables from given logic statements 3) Complete truth tables for given logic circuits 4) Draw logic circuits from given logic statements 5) Explain the difference between AND and OR gates

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Makanaka Sambureni
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3K views5 pages

Logic Gates Practice Questions

This document contains several logic circuit diagrams and truth tables along with questions about identifying logic gates from truth tables and drawing logic circuits from logic statements. Specifically, it asks the reader to: 1) Identify single logic gates from completed truth tables 2) Draw logic circuits and complete truth tables from given logic statements 3) Complete truth tables for given logic circuits 4) Draw logic circuits from given logic statements 5) Explain the difference between AND and OR gates

Uploaded by

Makanaka Sambureni
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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1 (a) Complete the truth tables and name the single logic gate that could replace each

ach logic circuit:


(i)
A Working space
A B X
X
B
0 0

0 1

1 0

1 1

Single logic gate ............................................................................................................ [3


]
(ii)
Working space
A B X
A
0 0

X
0 1

1 0
B
1 1

Single logic gate ............................................................................................................ [3


]
(b) Draw a logic circuit to represent the following logic statement:
(i) X = 1 if (A = 1 AND B = 1) OR ( (B = NOT 1) AND C = 1)

B X

(ii) Complete the truth table for the logic statement in part (b)(i).
Working space
A B C X

0 0 0

0 0 1

0 1 0

0 1 1

1 0 0

1 0 1

1 1 0

1 1 1

3 A logic circuit is shown below.

B
X

C
(a) Complete the truth table for the given logic circuit.
Working space
A B C X

0 0 0

0 0 1

0 1 0

0 1 1

1 0 0

1 0 1

1 1 0

1 1 1
(b) Draw a logic circuit corresponding to this logic statement:
X = 1 if (A is NOT 1) OR ((B is 1 OR C is 1) AND (B is NOT 1 OR A is NOT 1))

B X

(a) Complete the truth table for the NOR gate.

A
X

A B Output (X)

0 0

0 1

1 0

1 1
(b) Write a logic statement that corresponds with the following logic circuit.
A
B

X = ..................................................................................................................................... [3]
S17qp13 last paper
A logic circuit is shown:

(a) Complete the truth table for the given logic circuit.
Working space
A B C X

0 0 0

0 0 1

0 1 0

0 1 1

1 0 0

1 0 1

1 1 0

1 1 1
(b) Explain the difference between the functions of an AND gate and an OR gate.

10 A logic circuit is shown:


W18

Qp1 (a) Complete the truth table for the given logic circuit.
3
Working space
A B C X

0 0 0

0 0 1

0 1 0

0 1 1

1 0 0

1 0 1

1 1 0

1 1 1
(b) Draw a logic circuit corresponding to the logic statement:
X = 1 if ((A is 1 AND B is 1) AND (A is 1 OR C is NOT 1)) OR (B is 1 AND C is NOT 1)

B X

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